Carried out significant research work in the Photonics Research Lab, Nice, France, under the Indo-French Science & Technology Cooperation Program on “Specialty Optical Fiber and Fiber based components for Optical Communication” during 2007-2010 (in different spells) funded by DST. Other partners of this program were IIT Delhi, IIT Roorkee and CNRS Nice, France. The outcome of this research is published in international publications and helpful in the areas relating to Ultra-dense WDM Systems and All Optical Networks.